Manipulations of multi-frequency waves and signals via multi-partition asynchronous space-time-coding digital metasurface

Si Ran Wang, Jun Yan Dai, Qun Yan Zhou, Jun Chen Ke, Qiang Cheng () and Tie Jun Cui ()
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Si Ran Wang: Southeast University
Jun Yan Dai: Southeast University
Qun Yan Zhou: Southeast University
Jun Chen Ke: Southeast University
Qiang Cheng: Southeast University
Tie Jun Cui: Southeast University

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract Manipulations of multiple carrier frequencies are especially important in a variety of fields like radar detection and wireless communications. In conventional radio-frequency architecture, the multi-frequency control is implemented by microwave circuits, which are hard to integrate with antenna apertures, thus bringing the problems of expensive system and high power consumption. Previous studies demonstrate the possibility to jointly control the multiple harmonics using space-time-coding digital metasurface, but suffer from the drawback of inherent harmonic entanglement. To overcome the difficulties, we propose a multi-partition asynchronous space-time-coding digital metasurface (ASTCM) to generate and manipulate multiple frequencies with more flexibility. We further establish an ASTCM-based transmitter to realize wireless communications with frequency-division multiplexing, where the metasurface is responsible for carrier-wave generations and signal modulations. The direct multi-frequency controls with ASTCM provides a new avenue to simplify the traditional wireless systems with reduced costs and low power consumption.

Date: 2023
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DOI: 10.1038/s41467-023-41031-0

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